Terbitoby



(No Model.) 2 Sheets-Sheet 1. J. SANDON.

ORE GONOENTRATOR.

No. 379,418. Patented Mar. 13, 1888.

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(No Model.) 2 Sheets-Sheet 2.

J. SANDON. ORE CONGBNTRATOR.

No. 379,418. Patented Mar. 13, 1888.

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NiTED STATES PATENT ORE-CONCENTRATOR.

EPTCIPICATION iorniing part of Letters Patent No. 379,418, dated March 13, 1888.

(No model.)

To aZZ whom, it may concern:

Be it known that I, J OSEPH SANDON, a citizen of the United States, residing at Virginia City, in the county of Madison and Territory of Montana, haveinvented certain new and useful Iinprovementsin Ore-Concentrators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to machines for concentrating ore of that class in which the material is separated according to its specific gravity, and it has for its object to save the minerals, such as grey copper, silver glance, sulphurets, and antimony, and the finer valuable miner als which are light enough to float, and which are lost or wasted as treated by all the concentrators with which I am familiar; and it consists of the parts and combinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1. is a central vertical section through my improved ma chine; Fig. 2, a detail view, being a section on the line a; m, Fig. 1; Fig. 3, a plan view of one of the receiving or Settling tanks; Fig. 4, a perspective view of one ofthe sections forining the false bottoms of the settling-tanks, and Fig. 5 a plan view of the machine.

Similar letters refer to similar parts throughout the several views.

A represents a 'cylindrical tank having a conical bottom, a. This tank may be supported in any desired or convenient manner in an upright position. Around the upper portion of said tank is formed a circular trough, B, the upper edge of which stands or projects above the upper edge of the tank A, and which has an opening or outlet, 1), formed in one side thereof, the sides of which are provided with flanges c, 'which extend down nearly to the bottom of a sluice-box, O, which is attached in any suitable manner to the trough B. Along that part of said sluice-box which adjoins the tank A a number of riffles, d, are formed, and on a removable cover, D, which is provided with side flanges to overlap the flanges c and form a tight joint, is formed a number of rifflebars, (1, which, when the cover is in position, as shown, alternate with the riffles d, and thus form a tortuous passage, which greatly assists tank A.

the separation of the material under treatment. At the bottom of sluice-box O, at each side, outlets e are formed and sliding gates or doors E provided, whereby the box may be emptied at will of all the material which may be caught therein, and in the sides of the box, near its upper edge, are formed openings f, which communicate with a supplemental trough, F, attached to the tank A, and which surrounds the box 0 for a portion of its length and is on a level with the trough B. As shown in Fig.2, this trough also has an opening, 9, guarded by a sliding gate, h, and has a spout, h, projecting therefrom. In the center of the conical bottom of tank Aan opening is formed through which a tube, L, is passed, said tube extending through the bottom a short distance and being rigidly secured thereto, and the upper end of the tube projecting or extending above the tank. This tube is perforated on all sides from the bottom of the tank up about twothirds its length, and a shaft, M, either tubular or solid, of less diameter, is inserted or fitted within tube L, so as to be easily moved up or down therein, and thus open or close the perforations in tube L. If desired, the shaft M may be tubular and of greater diameter than tube L, in which case it will be slipped. over said tube.

On the side of tank A, opposite the sluicebox 0, I secure a double feeding trough or Home, G, which is divided by means of a horizontal longitudinal partition, in, into two sections, the upper of which receives the light floating tailings, which are conducted directly to the tank A and emptied therein at a point near its center, while the lower section receives the heavier tailings and conducts them to a vertical riffle box or sluice, N, provided with riftles arranged the same as those in the sluicebox-O above described, and thence into the It will thus be seen that the tailings are given a preliminary separation prior to their entrance to the tank by the sectional sluice 'or Home G, and that when they enter the same they are in the best condition for further treatment or separation, because the lighter particles are fed directly to the surface of the water in the tank, and such of it as is not heavy enough to sink is immediately floated over the edge of the tank into trough B, and is conducted by it to its opening and into the sluicebox through the riffles, where it is again subjected to treatment, the'lighter matter floating over the upper edge of the sluice-box and through the openings into the supplemental trough F, where, the volumeof water being less, the lightest floating material is concentrated, if desired. Ordinarily the double concentration is sufficient, and the gate h in trough F is opened the desired distance to regulate the discharge from the sluice.

It will be noticed that the sluice-box G and trough F flare outwardly from their bottoms, as shown in Fig.1, and that the sides above openings f also flare outwardly. This assists materially in the concentration of the tailings, as it tends to bring the heavier particles closer together The concentrates are drawn off from sluice-box 0 through the openings e. The heavier tailings, which enter the tank through the lower section of the flume, sink to the bottom of the tank, and when shaft M is raised to uncover the perforations in tube L they are drawn off through the perforations and into a double-inclined sluice or flume, K, which is pivotally secured to a post, K, so that it may be turned thereon to empty into different tanks, and passing down these inclines escape through coiled pipes a, secured in the lower ends of the sluices, into tanks P, which are pro vided with removable false bottoms formed of sector shaped plates R, the mineral catching in said bottom, which may be taken out and cleaned. The bottoms of these tanks are conical, so that the mineral will gravitate toward their peripheries, the water escaping over the top of the tanks.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. In an ore-concentrator, the combination of a tank, an upright perforated tube rigidly secured to the bottom of said tank, a shaft telescoped within said tube, atrough surrounding said tank and provided with an opening in its side, a vertical sluice provided with riffies, a sluice-box having an outlet at its bottom, a supplemental trough surrounding said sluice-box, and means for regulating the discharge therefrom, substantially as described.

sluice, a perforated tube, a sliding shaft for 7 opening and closing said perforations,a doubleinclined sluice supported beneath said tube, discharge-pipes therein, and receptacles to catch the discharge, substantially as described.

4. A flume or sluice for the preliminary separation of tailings and the feeding of the same to concentrators, having a horizontal partition arranged longitudinally therein at its discharge end, as set forth.

5. The hereinbeforedescribed concentrator, consisting ofa tank having a conical bottom, a perforated tube rigidly secured in said bottom, a-shaft for opening or closing the perforations in said tube, a trough surrounding said tank and having an opening in its side, a vertical sluice having riffles therein, a sluice'box having gates at its lower end and openings near its upper edge, a supplemental trough surrounding said sluice-box and provided with a gate to regulate its discharge. a feeding Hume having a horizontal and longitudinal partition therein, a vertical sluice having riflies in said tank, a double-inclined sluice pivotally supported beneath said tank, coiled dischargepipe therefor, and the receiving or settling tanks, as set forth.

In testimony whereof I affix my signatuie in presence of witnesses.

JQSEPH SANDON.

, Witnesses:

W. TVPIGOTT, BARCLAY JoNEs. 

